diff --git a/bitshift/parser/python.py b/bitshift/parser/python.py
index b4a7796..03f53b1 100644
--- a/bitshift/parser/python.py
+++ b/bitshift/parser/python.py
@@ -111,7 +111,7 @@ class _CachedWalker(ast.NodeVisitor):
 
         if isinstance(node.func, ast.Name):
             name = node.func.id
-        elif isinstance(node.func, ast.Attr):
+        elif isinstance(node.func, ast.Attribute):
             name = node.func.attr
         else:  # Dynamically selected functions, etc:
             return